Why do my car use alot of radiator coolant ?

Are you leaking it somewhere? If not you are probably buring it due to a blown HG.

I know there is a trick to try and determine if it is a blown HG by watching for bubbles escaping through the radiator fill as it is running. Someone else can provide more details.

Is the oil in good shape? Have you changed the intake manifold or anything recently?

Chris
 
Guys,

Our cars are notorious for developing a very slow leak on the passenger side of stock radiators, between the radiator core and the radiator end cap down low on that side.

It’s hard to see, and hard to diagnose, since it it’s a very slow leak and the leak mostly drips down onto the cross-member directly under the radiator, burns off, and never makes it to the garage floor.

Until I fixed that, my car had the same mysterious symptoms of a low coolant light every month or so, and some mild overheating when coming off of a long freeway run and getting back into slow city street traffic.
 
MLC Stang said:
Guys,

Our cars are notorious for developing a very slow leak on the passenger side of stock radiators, between the radiator core and the radiator end cap down low on that side.

It’s hard to see, and hard to diagnose, since it it’s a very slow leak and the leak mostly drips down onto the cross-member directly under the radiator, burns off, and never makes it to the garage floor.

Until I fixed that, my car had the same mysterious symptoms of a low coolant light every month or so, and some mild overheating when coming off of a long freeway run and getting back into slow city street traffic.

This is what happend to my car. :( Only found it after the radiator shop used the 'dye' in the cooling system and the leak showed up under the ultra-violet light. Fix was a new radiator.
 
MLC Stang said:
Guys,

Our cars are notorious for developing a very slow leak on the passenger side of stock radiators, between the radiator core and the radiator end cap down low on that side.

It’s hard to see, and hard to diagnose, since it it’s a very slow leak and the leak mostly drips down onto the cross-member directly under the radiator, burns off, and never makes it to the garage floor.

Until I fixed that, my car had the same mysterious symptoms of a low coolant light every month or so, and some mild overheating when coming off of a long freeway run and getting back into slow city street traffic.

Yeah im burning oil aswell.

Thanks MLC Stang, I guess i'll always bring a coolant bottle in the trunk :(
 
MLC Stang said:
Guys,

Our cars are notorious for developing a very slow leak on the passenger side of stock radiators, between the radiator core and the radiator end cap down low on that side.

It’s hard to see, and hard to diagnose, since it it’s a very slow leak and the leak mostly drips down onto the cross-member directly under the radiator, burns off, and never makes it to the garage floor.

Until I fixed that, my car had the same mysterious symptoms of a low coolant light every month or so, and some mild overheating when coming off of a long freeway run and getting back into slow city street traffic.

Same here, exact area to...I found mine couple years ago...i just keep tabs on it and top of the overfill bottle...another quirk of the SN95s.... :D